3 Replies Latest reply on Feb 20, 2009 5:48 PM by Bill McEachern

Open channel analysis with 2009 Flow Simulation

1-IDPEVE Feb 20, 2009 4:31 AM

I'm a newbie to 2009 Flow Simulation and am trying to evaluate models under partially submerged, gravity flow conditions - i.e. open channel flow. We bought this software with the understanding that this type of analysis was possible. However, when I set up the boundary conditions the thing runs as if the model is fully submerged regardless of flow. All of the tutorials and examples I've seen so far only address systems flowing full. I found one post that seemed to indicate others having trouble resolving a water/air interface with 2008 FloWorks. Can 2009 Flow Simulation do this somehow?

Open channel analysis with 2009 Flow Simulation

Bill McEachern Feb 20, 2009 12:08 PM (in response to 1-IDPEVE)

this may be disappointing: Flow Simulation (aka Floworks) has no support for free surface flows. You can enable the gravity potential switch to get a gravity induced flow. If free surface effects are not relavent then you can enclose the channel with an ideal wall to approximate the free surface at least with respect to its wall effects.
Like Show 0 Likes(0)

Actions
- Open channel analysis with 2009 Flow Simulation
  
  1-IDPEVE Feb 20, 2009 2:41 PM (in response to Bill McEachern)
  
  I appreciate the feedback. Unfortunately, free surface effects are important since I'm interested in establishing both water surface elevation and head loss with gravity flow at a given rate through a structure. I'm not sure that I understand the ideal wall idea, but I'll play around with it. Thanks.
  
  Like Show 0 Likes(0)
  
  Actions
  - Open channel analysis with 2009 Flow Simulation
    
    Bill McEachern Feb 20, 2009 5:48 PM (in response to 1-IDPEVE)
    
    an ideal wall is a convecting wall - it moves with the fluid or is frictionless - depending onhow you want to look at it. It is still a boundary though of whatever shape you give it - no flow through the wall.
    
    Like Show 0 Likes(0)
    
    Actions

Go to original post